SagBot is a free website readiness checker that evaluates whether AI bots and agents can access and use a site, and whether its content is structured to be cited by answer engines. A scan runs 40 checks and provides two scores out of 100: Agent-ready, for crawler access and usability, and Answer-ready, for factors related to citation in AI-generated answers. The Answer-ready score covers search engine optimization (SEO), generative engine optimization (GEO), and answer engine optimization (AEO). The checker assesses readiness for 11 AI engines and reviews public site resources, including robots.txt, the homepage, the sitemap, llms.txt, and selected files under /.well-known. Reports identify failed checks and provide suggested fixes that can be copied into coding tools such as Claude Code, Cursor, or Copilot. Users can apply the suggestions in a site repository and review changes before publishing them. To use SagBot, a user enters a domain and runs a scan. Scans are free and do not require an account. The service makes a limited number of GET and HEAD requests, with each request stopping after eight seconds or two megabytes; scan results are reused for an hour. SagBot checks crawler access and content readiness, but does not determine whether an AI engine already cites a site, since citations also depend on factors such as site authority and user queries.